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, 1- Br. MCINTOSH. E Grate for Stoves and Furnaces. 4N-9512507 Patented-sept. 28, 1869.

PETERS. Phoelhhugnpher waxhmgmn. n c

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JLB; MrNTosn, orN ERIE PENNSYLVANIA' `Letters Patent No. 95,250, dated September 2.8, 1869.v Y

dans son s'rfovns ANDrURNAcns.

` "The Schedule referred in these Letters Patent land :makingl part of the same. 1

Be it known that'I, J. B. MCINTOSH, of the city of Erie, and county fof Erie, and State of Pennsylvania, have invented anew and useful Improvement in yGratos for Goal-Stoves and Furnaces; and I do here- `by declare that the following is a' full, clear,and exact description of the? construction and operation of the same, reference being'had `to the annexed drawings,

making a part of this specification, in which-'-v `Figure 1 is aplane view, exhibiting the grateas adjusted forfnne.4v l Y Fignre2 is an 'upright cross-section from A to A,

Eignrjla 3, plane view of cross-bar B, showing the i mortise' YC,.in which is fitted the stem D of thestar- .centre E; i

. E and G are two rings,`p1aced one abovethe other,

. .iiwith a series tif-projecting bars, H and I, 'on their .j "E is a `etar-eentre,lwith a stem, D, fitted in niortiseO, in a manner that Athe star-centre `libe allowed to vibrate in a circular direction, as occasionmay require, for the purpose of Ithrowing ashes, cnder, and

i l clinkerffrom the centre ofthe grate.

` Figure 4 represents `the grate,- With thev `upper ring g F and its projecting bars I, turned aside, in a manner that the projecting lbars Iare` adjusted over, and to coincide with the projecting bars'H, on the bottom `ring Gthere`by"donbling 4the vsize of the openings J, and j ai'ording ya freef passa ge Afor ashes, Vcinder, and

clinlrer.

YY1-The nature of `my yinvention consists in providing, for coal-stoves; and furnaces, grates to supportcoal in combustion, constructed' by the' use of two rings, one* placed above the'other,` with bars projecting from their inner rims toward the `centre, -each alternate bar" on the npper and lower rings, that by allowing the bottoni ring to be made stationary, and the upper one vmovable `in a circul'armanner, the openings in the ,grate maybe enlarged, to discharge ashes,cinder, and

clinker. y

The operation` of my improvement is` asV follows: The bottoni ring, G,with internalprojecting bars H, and cross-bar B, to remainstationary.

' 4The top ring, F, with internal-projecting bars I,l so

constructed as to allow a circular motion, to admit.`

the projecting bars I to be adjusted over the projecting bai-SVH, thereby doubling the size of the openings J, thus affording a free passage for ashes, cinder, and

clinker.

v The.projecting bars to beimade,.in number and sizefto produce the desired openings in the grate.

I laiiml l 1. The stancentre E, fixed in mortise C.

2.-,'.[he construction of a grate, ln'almanner that scribed, and-for the purpose set forth.' l Y J. B.IMCINTOSH.

tbe openings J may be enlarged, substantially as de- Witnesses: f J. O. TONER, l Y ANDREW J AoKsoN, E. OAMPHAUSEN. 

